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drm/radeon: add userptr flag to register MMU notifier v3

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Whenever userspace mapping related to our userptr change
we wait for it to become idle and unmap it from GTT.

v2: rebased, fix mutex unlock in error path
v3: improve commit message

Signed-off-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Christian König
2014-08-07 09:36:03 +02:00
committed by Alex Deucher
parent 2a84a4476d
commit 341cb9e426
8 changed files with 298 additions and 2 deletions
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9
drivers/gpu/drm/radeon/radeon_gem.c
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@@ -291,7 +291,8 @@ int radeon_gem_userptr_ioctl(struct drm_device *dev, void *data,
/* reject unknown flag values */
if (args->flags & ~(RADEON_GEM_USERPTR_READONLY |
RADEON_GEM_USERPTR_ANONONLY | RADEON_GEM_USERPTR_VALIDATE))
RADEON_GEM_USERPTR_ANONONLY | RADEON_GEM_USERPTR_VALIDATE |
RADEON_GEM_USERPTR_REGISTER))
return -EINVAL;
/* readonly pages not tested on older hardware */
@@ -312,6 +313,12 @@ int radeon_gem_userptr_ioctl(struct drm_device *dev, void *data,
if (r)
goto release_object;
if (args->flags & RADEON_GEM_USERPTR_REGISTER) {
r = radeon_mn_register(bo, args->addr);
if (r)
goto release_object;
}
if (args->flags & RADEON_GEM_USERPTR_VALIDATE) {
down_read(&current->mm->mmap_sem);
r = radeon_bo_reserve(bo, true);